Writing & History. History is impossible without the written word as one would lack context in which to interpret physical evidence from the ancient past. Writing records the lives of a people and so is the first necessary step in the written history of a culture or civilization.
Lesson Summary. In review, chemical energy is energy stored in chemicals'. Energy is 'the ability to do work. Chemical energy is a type of potential energy that is energy due to the position of an object or objects.
Quantum Chemistry. a branch of theoretical chemistry that considers problems of structure and reactivity of chemical compounds as well as problems of bonding from the point of view of the concepts and methods of quantum mechanics.n principle, quantum mechanics permits calculation of the properties of atomic and molecular systems on the basis of the Schroedinger schrÃ¶dinger, Equation pauli exclusion, principle and universal physical. constants